Seat and back rest for a chair



FIG. 1 is a perspective view showing the top, left side and front of a seat and back rest for a chair which forms my new design, the broken lines showing other parts of the chair being for illustrative purposes only and forming no part of my design;

FIG. 2 is a right side elevational view thereof;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a front elevational view thereof.

The short, broken lines on the chair shown in FIGS. 1-6 are understood to represent stitching. 

The ornamental design for a seat and back rest for a chair, as shown and described. 